A positioning butt joint device for stainless steel plate welding

Abstract

The present invention relates to the technical field of stainless steel plate processing, and more specifically, to a positioning and docking device for stainless steel plate welding. It includes a pair of operating tables for placing stainless steel plates and a U-shaped frame connecting the side positions of the two operating tables. The present invention uses two pushing components to push the two stainless steel plates to move in parallel along the top of the operating table at the corresponding position, and drives the two clamping blocks to move along the top position of the U-shaped frame, so that the two clamping blocks are close to each other and gradually contact the other two sides of the stainless steel plate. The two pushing components are used to correct and align the other two sides of the stainless steel plate, and the shielding component is reset to cover the inner end of the preheating groove again. The drainage groove and the isolation chamber are used to temporarily store the heat flow generated during the welding process for later use in preheating the newly processed stainless steel plate.

Description

Technical Field

[0001] The invention relates to the technical field of stainless steel plate processing, in particular to a positioning and docking device for stainless steel plate welding. Background Art

[0002] The surface of stainless steel plate is smooth, with high plasticity, toughness and mechanical strength. Stainless steel plate is also resistant to corrosion by acid, alkaline gas, solution and other media. It is an alloy steel that is not easy to rust, but it is not absolutely rust-free.

[0003] During the processing of stainless steel plates, since they need to adapt to the use in different scenarios, they often need to be welded to make their lengths meet the use of different scenarios. During the welding of stainless steel plates, it is first necessary to ensure that the welding position is corrected and aligned to avoid welding errors, etc., which will lead to the need for secondary rework later. At the same time, if the room temperature is low, such as welding stainless steel plates in winter, since the room temperature is below 0 degrees, welding at this time will not only reduce the fusion between the welding equipment and the stainless steel plate, affecting the welding effect, but also if preheating is ignored during the welding of stainless steel plates, the thermal stress generated will easily cause cracks, reducing the mechanical properties and quality of the joints.

[0004] In order to address the above problems, a positioning and docking device for stainless steel plate welding is urgently needed. Summary of the invention

[0005] The object of the present invention is to provide a positioning butt joint device for stainless steel plate welding to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, a positioning and docking device for stainless steel plate welding is provided, comprising a pair of operating tables for placing stainless steel plates and a U-shaped frame connecting the side positions of the two operating tables, wherein one of the operating tables is provided with a welding assembly for welding the close contact area of ​​the two stainless steel plates that have been docked, near the side position of the U-shaped frame, and an isolation chamber for centrally collecting slag and heat flow generated during the welding process is formed between the top of the U-shaped frame and the adjacent side walls of the two operating tables, and the two operating tables are provided with a drainage groove connected to the inner end of the isolation chamber near one side of the U-shaped frame, and a preheating groove connected to the drainage groove is provided at the top of the operating table, and an air guide assembly is provided on the inner side of the drainage groove, through which the heat flow at the inner end of the isolation chamber is guided to the inner end of the preheating groove;

[0007] Pushing components for pushing the stainless steel plate to the welding position are provided on both sides of the top of the operating table, and a shielding component is provided at the inner end of the preheating groove. In the initial state, the shielding component covers the top position of the inner end of the preheating groove, preventing the inner end from discharging heat flow outward. A positioning component is connected between the shielding component and the pushing component. The pushing component pushes each area of ​​the bottom end of the stainless steel plate to pass directly above the preheating groove in sequence, and under the action of the positioning component, drives the shielding component to adjust its position and loses the covering state of the top of the preheating groove. The heat flow at the inner end of the preheating groove is discharged outward along the top of the preheating groove, and preheats each area of ​​the stainless steel plate passing through. At the same time, clamping components are provided on both sides of the top of the U-shaped frame. In the process of the pushing component pushing the stainless steel plate to move, the pushing component will synchronously drive the two clamping components to approach each other, and clamp and fix the other two sides of the stainless steel plate, so that the welding positions of the two stainless steel plates are corrected and aligned.

[0008] As a further improvement of the present technical solution, the pushing assembly includes a push plate and a hydraulic rod installed on the side of the push plate, one end of the hydraulic rod is connected to the top position of the side of the push plate, and the other end of the hydraulic rod is fixed to the inner end position of the side of the operating table, and splints are provided on both sides of the top of the operating table, and a gap is reserved between the bottom end of the splint and the top of the operating table, and the two ends of the push plate respectively keep sliding along the two gaps.

[0009] As a further improvement of the present technical solution, the shielding assembly includes a pair of gears, a shielding plate is connected between adjacent sides of the two gears, the cross-sectional size of the shielding plate is consistent with the cross-sectional size of the inner end of the preheating groove, and a reset assembly is connected between the two gears and the inner end of the operating table.

[0010] As a further improvement of the present technical solution, the positioning assembly includes a pair of tooth plates, the two tooth plates are respectively arranged on both sides of the bottom end of the push plate, and the bottom end of the tooth plate is meshedly connected with the outer side of the gear at the corresponding position.

[0011] As a further improvement of the present technical solution, the reset assembly includes a pair of side shafts and a torsion spring arranged on the outside of the side shafts. The side shafts are coaxially connected to the side faces of the gear, and the torsion springs are located at the connection between the outside of the side shafts and the inner end of the preheating groove.

[0012] As a further improvement of the present technical solution, the clamping assembly includes a clamping block, U-shaped rods are provided on both sides of the top of the U-shaped frame, the clamping block is plugged into the U-shaped rod, the clamping block slides parallel to the outer side of the U-shaped rod, a return spring is connected between one end of the clamping block and the outer side of the U-shaped rod, clamping rods are provided on both sides of the other end of the clamping block, wedge rods are provided at the ends of the two tooth plates, and wedge-shaped structures are provided on both sides of the clamping block.

[0013] As a further improvement of the present technical solution, sealing plates are provided on both sides of the inner end of the U-shaped frame, the ends of the two sealing plates are fitted together, the two sealing plates are located at the inner end of the isolation chamber, and the cross-sectional size of the sealing plate is consistent with the cross-sectional size of the inner end of the isolation chamber, and a connecting shaft is provided at the other end of the sealing plate, and the two sides of the connecting shaft are respectively rotatably connected to the two side surfaces of the operating tables, and the two sides of the connecting shaft are respectively connected to the inner ends of the two operating tables by coil springs, a plurality of tooth grooves are provided on the outer side of the connecting shaft, and a gear rod is provided at the bottom end of the clamping block which is meshed with the outer side of the connecting shaft.

[0014] As a further improvement of the present technical solution, the air guide assembly includes a partition, which is placed at the inner end of the drainage groove, and a plurality of wind rings connected to the inner end of the drainage groove are arranged on the side of the partition, the wind ring has impellers built in, a filter screen for blocking debris is arranged on the outside of the wind ring, and a heating pipe for heating the airflow is arranged at the inner end of the preheating groove.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. In the positioning and docking device for stainless steel plate welding, two pushing components are used to push the two stainless steel plates to move parallel to the top of the operating table at the corresponding position, and the two clamping blocks are driven to move along the top position of the U-shaped frame, so that the two clamping blocks are close to each other and gradually contact with the other two sides of the stainless steel plate. The two pushing components are used to correct and align the other two sides of the stainless steel plate. At the same time, the shielding component is reset to cover the inner end of the preheating tank again. The drainage tank and the isolation chamber are used to temporarily store the heat flow generated during the welding process for later use in preheating the newly processed stainless steel plate.

[0017] 2. In the positioning and docking device for stainless steel plate welding, the isolation chamber is isolated by a sealing plate. When the wedge-shaped rod arranged at the end of the tooth plate does not contact the side of the clamping block, the position of the clamping block is constant. The two sealing plates maintain their two ends aligned with each other under the action of the coil spring, forming a covering plate at the inner end of the isolation chamber. At this time, the top of the drainage groove is covered and isolated by a shield plate, and the inner end of the isolation chamber is isolated by a covering plate, ensuring that the heat flow at the inner ends of the isolation chamber, the drainage groove and the preheating groove can be temporarily stored without escaping. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic plan view of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 3 It is a disassembled diagram of the overall structure of the present invention;

[0021] Figure 4 It is a split cross-sectional view of the operating table structure of the present invention;

[0022] Figure 5 For the present invention Figure 4 A local enlarged view of point A;

[0023] Figure 6 It is a schematic diagram of the push component structure of the present invention;

[0024] Figure 7 It is a schematic diagram of the structure of the shielding component of the present invention;

[0025] Figure 8 This is a schematic diagram of the connection between the pushing component and the shielding component of the present invention;

[0026] Fig. 9 It is a schematic diagram of the U-shaped frame structure of the present invention;

[0027] Fig.10 It is a schematic diagram of the sealing plate structure of the present invention;

[0028] Fig.11 It is a schematic diagram of the clamping block structure of the present invention.

[0029] The meaning of each number in the figure is:

[0030] 10. Operation table; 110. Preheating slot; 120. Drainage slot; 121. Partition plate; 122. Air ring; 123. Blade fan; 130. Clamp plate; 140. Push assembly; 141. Push plate; 142. Hydraulic rod; 143. Tooth plate; 150. Shielding assembly; 151. Gear; 152. Shielding plate; 153. Torsion spring;

[0031] 20. U-shaped frame; 210. U-shaped rod; 220. Sealing plate; 221. Connecting shaft; 230. Clamping block; 231. Clamping rod; 232. Gear rod. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] See also Figure 1-Figure 11 As shown, a positioning docking device for stainless steel plate welding is provided, comprising a pair of operating tables 10 for placing stainless steel plates and a U-shaped frame 20 connecting the side positions of the two operating tables 10, wherein one of the operating tables 10 is provided with a welding assembly for welding the close contact area of ​​the two stainless steel plates that have been docked near the side position of the U-shaped frame 20, and an isolation chamber for centrally collecting slag and heat flow generated during the welding process is formed between the top of the U-shaped frame 20 and the adjacent side walls of the two operating tables 10, and the two operating tables 10 are provided with a drainage groove 120 that is connected to the inner end of the isolation chamber near the side position of the U-shaped frame 20, and a preheating groove 110 that is connected to the drainage groove 120 is provided at the top of the operating table 10, and an air guide assembly is provided inside the drainage groove 120, and the heat flow at the inner end of the isolation chamber is guided to the inner end of the preheating groove 110 through the air guide assembly;

[0035] Both sides of the top of the operating table 10 are provided with a pushing assembly 140 for pushing the stainless steel plate to the welding position, and a shielding assembly 150 is provided at the inner end of the preheating tank 110. In the initial state, the shielding assembly 150 covers the top position of the inner end of the preheating tank 110 to prevent the inner end from discharging heat flow outward. A positioning assembly is connected between the shielding assembly 150 and the pushing assembly 140. The pushing assembly 140 pushes each area of ​​the bottom end of the stainless steel plate to pass directly above the preheating tank 110 in turn, and under the action of the positioning assembly, drives the shielding assembly 150 to move forward. 50 is adjusted in position, and the covering state of the top of the preheating tank 110 is lost. The heat flow at the inner end of the preheating tank 110 is discharged outward along the top of the preheating tank 110, and preheats various areas of the stainless steel plate passing through. At the same time, clamping components are arranged on both sides of the top of the U-shaped frame 20. When the pushing component 140 pushes the stainless steel plate to move, the pushing component 140 will synchronously drive the two clamping components to approach each other, and clamp and fix the other two sides of the stainless steel plate, so that the welding positions of the two stainless steel plates are corrected and aligned.

[0036] When in use, during the welding process of the stainless steel plates, first, the two stainless steel plates are placed at the top positions of the two operating tables 10 respectively, and the two pushing assemblies 140 are used to push the two stainless steel plates to move parallel to the top positions of the operating tables 10 at the corresponding positions, so that the two stainless steel plates gradually approach each other. In this process, as the two pushing assemblies 140 continue to move, the two pushing assemblies 140 gradually contact the sides of the two clamping blocks 230, and drive the two clamping blocks 230 to move along the top positions of the U-shaped frame 20, so that the two clamping blocks 230 approach each other and gradually contact the other two sides of the stainless steel plates, and cooperate with the two pushing assemblies 140 to correct and align the other two sides of the stainless steel plates. At this time, the fitting position of the two stainless steel plates is just located directly above the U-shaped frame 20. At this time, the fitting position of the two stainless steel plates is welded and fixed by the welding assembly, and the debris and heat flow generated during the welding process are introduced into the inner end of the isolation chamber, and under the action of the air guide assembly, the heat flow is guided to the inner end of the preheating groove 110 through the drainage groove 120 for temporary storage. After the welding work is completed, the two pushing assemblies 140 Reset, at this time, the two clamping blocks 230 lose the external force and return to the initial position. The sides of the two stainless steel plates after welding are no longer limited. The operators manually take them out and place the two new stainless steel plates on the top of the two operating tables 10 in turn. At this time, under the action of the two pushing components 140, the two stainless steel plates are pushed to the welding position again. In this process, the pushing component 140 pushes the bottom ends of the two stainless steel plates to pass over the preheating tank 110 in turn, and under the action of the positioning component, drives the shielding component 150 at the inner end of the preheating tank 110 to adjust its position, so that the heat flux previously stored in the inner end of the preheating tank 110 is discharged outward from the top of the preheating tank 110, and the area passed by the stainless steel plate is preheated until the two stainless steel plates complete the positioning work again, the positioning component loses the effect on the shielding component 150, and the shielding component 150 is reset to cover the inner end of the preheating tank 110 again, and cooperates with the drainage groove 120 and the isolation chamber to temporarily store the heat flux generated during the welding process for later use in preheating the newly processed stainless steel plate.

[0037] In addition, the pushing assembly 140 includes a pushing plate 141 and a hydraulic rod 142 installed on the side of the pushing plate 141, one end of the hydraulic rod 142 is connected to the top position of the side of the pushing plate 141, and the other end of the hydraulic rod 142 is fixed to the inner end position of the side of the operating table 10. Clamps 130 are arranged on both sides of the top of the operating table 10, and a gap is reserved between the bottom end of the clamp 130 and the top of the operating table 10. The two ends of the pushing plate 141 keep sliding along the two gaps respectively. In the process of docking the stainless steel plates, the stainless steel plates are first placed on the top of the two preheating grooves 110, and the hydraulic rod 142 drives the pushing plate 141 to move horizontally along the top of the operating table 10, and pushes the stainless steel plates to move synchronously until the two stainless steel plates are pushed between the ends to fit each other, and the two clamping assemblies are cooperated to correct the position of the stainless steel plates to complete the positioning and docking work.

[0038] Furthermore, the shielding assembly 150 includes a pair of gears 151, and a shield plate 152 is connected between adjacent sides of the two gears 151. The cross-sectional size of the shield plate 152 is consistent with the cross-sectional size of the inner end of the preheating groove 110. A reset assembly is connected between the two gears 151 and the inner end of the operating table 10. In the initial state, the two gears 151 are not affected by the positioning assembly. At this time, the shield plate 152 is located in the middle position of the inner end of the preheating groove 110, and covers the inner end of the preheating groove 110 to block the heat flow escaping from the inner end of the preheating groove 110. As the push plate 141 moves further, the two gears 151 will be driven to adjust their positions through the positioning assembly, and the shield plate 152 will be driven to adjust its position simultaneously, so that the shield plate 152 moves out of the middle position of the inner end of the preheating groove 110. At this time, the inner end of the preheating groove 110 is in a conducting state, and the heat flow introduced from the inner end of the drainage groove 120 will be discharged outward along the inner end of the preheating groove 110, and the top end will be preheated through different areas of the stainless steel plate.

[0039] Furthermore, the positioning assembly includes a pair of tooth plates 143, the two tooth plates 143 are respectively arranged on both sides of the bottom end of the push plate 141, and the bottom end of the tooth plate 143 is meshed with the outer side of the gear 151 at the corresponding position. When the push plate 141 pushes the stainless steel plate to move under the action of the hydraulic rod 142, the two tooth plates 143 will be synchronously driven to adjust their positions, and a tooth block is arranged at the bottom end of the tooth plate 143. When the tooth block arranged at its bottom end contacts the outer side of the gear 151, the tooth plate 143 will be meshed with the gear 151 at the corresponding position. The translation of the tooth plate 143 will drive the gear 151 to rotate, thereby moving the shield plate 152 to the middle position of the inner end of the preheating groove 110, losing the covering state of the inner end of the preheating groove 110, and preheating the stainless steel plate area passing through the heat flow discharged by the preheating groove 110. As the tooth block at the bottom end of the tooth plate 143 moves out of the outer position of the gear 151, the tooth plate 143 and the gear 151 lose the meshing connection at this time, and under the action of the reset component, the two gears 151 and the shield plate 152 are reset, and the inner end of the preheating groove 110 is sealed again.

[0040] Specifically, the reset assembly includes a pair of side shafts and a torsion spring 153 arranged on the outside of the side shaft. The side shaft is coaxially connected to the side of the gear 151. The torsion spring 153 is located at the connection between the outside of the side shaft and the inner end of the preheating groove 110. When the tooth plate 143 drives the gear 151 to rotate, the gear 151 will synchronously drive the side shaft coaxially connected thereto to rotate. When the side shaft rotates, the torsion spring 153 will be squeezed, causing the torsion spring 153 to be in a compressed state until the gear 151 and the tooth plate 143 lose the meshing connection state. The torsion spring 153 loses the external force and will use its own elastic force to drive the gear 151 and the baffle 152 to reset through the side shaft.

[0041] In addition, the clamping assembly includes a clamping block 230, U-shaped rods 210 are provided on both sides of the top of the U-shaped frame 20, the clamping block 230 and the U-shaped rod 210 are plugged together, the clamping block 230 slides parallel to the outer side of the U-shaped rod 210, a return spring is connected between one end of the clamping block 230 and the outer side of the U-shaped rod 210, clamping rods 231 are provided on both sides of the other end of the clamping block 230, wedge-shaped rods are provided at the ends of the two tooth plates 143, and a wedge-shaped structure is provided on both sides of the clamping block 230. As the two tooth plates 143 are continuously Move and gradually approach the side positions of the two clamping rods 231. At this time, the wedge-shaped rod set at the end of the tooth plate 143 will contact the wedge surfaces on both sides of the clamping block 230 in advance, and the two clamping blocks 230 will be pushed to move parallel along the U-shaped rod 210 at the corresponding position under the action of friction, so that the two clamping blocks 230 are close to each other and the reset springs connected thereto are pulled. The clamping blocks 230 during the movement process correct and align the other two sides of the stainless steel plate to complete the positioning and docking work on each side of the stainless steel plate.

[0042] Since one end of the isolation chamber is connected to the inner end of the drainage groove 120 and the other end is always in an open state, it is easy to cause some heat flow to escape. Furthermore, sealing plates 220 are provided on both sides of the inner end of the U-shaped frame 20. The ends of the two sealing plates 220 are fitted with each other. The two sealing plates 220 are located at the inner end of the isolation chamber, and the cross-sectional size of the sealing plate 220 is consistent with the cross-sectional size of the inner end of the isolation chamber. A connecting shaft 221 is provided at the other end of the sealing plate 220. The two sides of the connecting shaft 221 are respectively rotatably connected to the side surfaces of the two operating tables 10, and the two sides of the connecting shaft 221 are respectively connected to the inner ends of the two operating tables 10 with coil springs. A plurality of tooth grooves are provided on the outer side of the connecting shaft 221, and a gear rod 232 is provided at the bottom end of the clamping block 230 to be meshed with the outer side of the connecting shaft 221. The isolation chamber is isolated by the provided sealing plate 220. When the wedge rod provided at the end of the tooth plate 143 does not contact the side surface of the clamping block 230, the position of the clamping block 230 is The two sealing plates 220 are in a constant state, and the two ends of the sealing plates 220 are kept aligned with each other under the action of the coil spring, forming a covering plate at the inner end of the isolation chamber. At this time, the top of the drainage groove 120 is covered and isolated by the shield plate 152, and the inner end of the isolation chamber is isolated by the covering plate, ensuring that the heat flux in the inner ends of the isolation chamber, the drainage groove 120 and the preheating groove 110 can be temporarily stored without escaping, until the wedge rod set at the end of the tooth plate 143 contacts the side of the clamping block 230, driving the two clamping blocks 230 to approach each other. At this time, the clamping block 230 drives the connecting shaft 221 to rotate through the tooth rod 232, causing the two sealing plates 220 to deviate downward to form a V-shaped structure, and a gap is formed at the bottom end to maintain communication with the inner end of the isolation chamber, through which the heat flux generated during the welding process is collected and processed until the welding work is completed, the push plate 141 is reset, and the two sealing plates 220 are driven to reset under the action of the coil spring, and the remaining heat flux that has not escaped from the top of the preheating groove 110 is stored again.

[0043] Furthermore, the air guide assembly includes a partition 121, which is placed at the inner end of the drainage groove 120, and a plurality of air rings 122 connected to the inner end of the drainage groove 120 are arranged on the side of the partition 121, and the air ring 122 is provided with a blade fan 123, and a filter screen is arranged on the outer side of the air ring 122 to block debris. A heating pipe for heating the airflow is arranged at the inner end of the preheating groove 110. In the process of guiding the heat flow at the inner end of the isolation chamber, the blade fan 123 at the inner end of the air ring 122 is first started, and the heat flow at the inner end of the isolation chamber is guided to the inner end of the air ring 122 by the vortex generated by the blade fan 123, and the debris is removed by the filter screen. Filter to prevent it from entering the inner end of the air ring 122, and guide the heat flow into the inner end of the preheating tank 110, and discharge it outward through the inner end of the preheating tank 110 to preheat the stainless steel plate passing through. It is worth mentioning that the preheating tank 110 is equipped with a heating tube. When it is used for the first time, the heat source cannot be provided, resulting in the inability to discharge the heat flow outward from the inner end of the preheating tank 110. At this time, the airflow at the inner end of the preheating tank 110 is heated by the heating tube to generate heat, forming a heat flow for preheating the stainless steel plate processed for the first time, and after completing the preheating work, stop working, and use the heat flow generated in the welding process for preheating later.

[0044] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A positioning docking device for stainless steel plate welding, comprising a pair of operating tables (10) for placing stainless steel plates and a U-shaped frame (20) connecting the side positions of the two operating tables (10), wherein one of the operating tables (10) is provided with a welding assembly for welding the close contact area of ​​the two stainless steel plates after docking, close to the side position of the U-shaped frame (20), characterized in that: An isolation chamber for collecting slag and heat generated during welding is formed between the top of the U-shaped frame (20) and adjacent side walls of the two operating tables (10); a drainage groove (120) communicating with the inner end of the isolation chamber is provided on one side of the two operating tables (10) close to the U-shaped frame (20); a preheating groove (110) communicating with the drainage groove (120) is provided on the top of the operating table (10); an air guide component is provided inside the drainage groove (120); and the heat flow at the inner end of the isolation chamber is guided to the inner end of the preheating groove (110) through the air guide component; Both sides of the top of the operating table (10) are provided with a pushing assembly (140) for pushing the stainless steel plate to the welding position. The inner end of the preheating groove (110) is provided with a shielding assembly (150). In an initial state, the shielding assembly (150) covers the top position of the inner end of the preheating groove (110) to prevent the inner end from discharging heat flow outward. A positioning assembly is connected between the shielding assembly (150) and the pushing assembly (140). The pushing assembly (140) pushes each area of ​​the bottom end of the stainless steel plate to pass directly above the preheating groove (110) in sequence, and under the action of the positioning assembly, the stainless steel plate is driven The shielding component (150) is moved to adjust its position, and the covering state of the top of the preheating groove (110) is lost. The heat flow at the inner end of the preheating groove (110) is discharged outward along the top of the preheating groove (110), and various areas of the stainless steel plate passing through are preheated. At the same time, clamping components are arranged on both sides of the top of the U-shaped frame (20). When the pushing component (140) pushes the stainless steel plate to move, the pushing component (140) will synchronously drive the two clamping components to approach each other, and clamp and fix the other two sides of the stainless steel plate, so that the welding positions of the two stainless steel plates are corrected and aligned; The pushing assembly (140) comprises a pushing plate (141) and a hydraulic rod (142) mounted on a side of the pushing plate (141), one end of the hydraulic rod (142) is connected to the top position of the side of the pushing plate (141), and the other end of the hydraulic rod (142) is fixed to the inner end position of the side of the operating table (10), and clamping plates (130) are arranged on both sides of the top of the operating table (10), and a gap is reserved between the bottom end of the clamping plate (130) and the top of the operating table (10), and the two ends of the pushing plate (141) respectively keep sliding along the two gaps; The shielding assembly (150) comprises a pair of gears (151), a shielding plate (152) is connected between adjacent sides of the two gears (151), the cross-sectional dimensions of the shielding plate (152) are consistent with the cross-sectional dimensions of the inner end of the preheating tank (110), and a reset assembly is connected between the two gears (151) and the inner end of the operating table (10); The positioning assembly comprises a pair of tooth plates (143), the two tooth plates (143) being respectively arranged on both sides of the bottom end of the push plate (141), and the bottom ends of the tooth plates (143) are meshedly connected with the outer sides of the gears (151) at corresponding positions; The clamping assembly comprises a clamping block (230), U-shaped rods (210) are provided on both sides of the top of the U-shaped frame (20), the clamping block (230) and the U-shaped rod (210) are plugged together, the clamping block (230) slides parallel to the outer side of the U-shaped rod (210), a return spring is connected between one end of the clamping block (230) and the outer side of the U-shaped rod (210), clamping rods (231) are provided on both sides of the other end of the clamping block (230), wedge-shaped rods are provided at the ends of the two tooth plates (143), and wedge-shaped structures are provided on both sides of the clamping block (230).

2. The positioning and docking device for stainless steel plate welding according to claim 1, characterized in that: The reset assembly comprises a pair of side shafts and a torsion spring (153) arranged on the outside of the side shafts, the side shafts are coaxially connected to the side of the gear (151), and the torsion spring (153) is located at the connection between the outside of the side shafts and the inner end of the preheating groove (110).

3. The positioning and docking device for stainless steel plate welding according to claim 1, characterized in that: Sealing plates (220) are provided on both sides of the inner end of the U-shaped frame (20), the ends of the two sealing plates (220) are fitted together, the two sealing plates (220) are located at the inner end of the isolation chamber, and the cross-sectional dimensions of the sealing plates (220) are consistent with the cross-sectional dimensions of the inner end of the isolation chamber, and a connecting shaft (221) is provided at the other end of the sealing plate (220), the two sides of the connecting shaft (221) are respectively rotatably connected to the side surfaces of the two operating tables (10), and the two sides of the connecting shaft (221) are respectively connected to the inner ends of the two operating tables (10) by coil springs, a plurality of tooth grooves are provided on the outer side of the connecting shaft (221), and a gear rod (232) is provided at the bottom end of the clamping block (230) to be meshed with the outer side of the connecting shaft (221).

4. The positioning and docking device for stainless steel plate welding according to claim 1, characterized in that: The air guide assembly comprises a partition plate (121), the partition plate (121) being disposed at the inner end of the drainage groove (120), and a plurality of air rings (122) being arranged on the side of the partition plate (121) and being in communication with the inner end of the drainage groove (120), the air ring (122) having a built-in blade fan (123), a filter screen for blocking debris being arranged on the outer side of the air ring (122), and a heating pipe for heating the airflow being arranged at the inner end of the preheating groove (110).

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